Embossing tool



FIG. 1 is a perspective view from the front, one side and above of an embossing tool showing my new design;

FIG. 2 is a perspective view from the rear, below and the other side thereof;

FIG. 3 is a side elevation showing said other side; and

FIG. 4 is a front elevation. 

The ornamental design for an embossing tool, substantially as shown and described. 